ALU is the part of the CPU that does math.
I have no clue what an ALU is I just designed this off of experimentation. Yes the addition is analog, I'll assume that's what you're talking about. This calculator is pretty much a digital abacus.
this doesnt use a traditional ALU desing as far as i can tell, i think it uses decimal counters to facilitate addition by iterative incrementation, i could help you learn more traditional ALU designs which actually use binary, which would be mroe useful for a computer
I sorta Need To Know How to Make an ALU, for my Computer Project, And You Clearly Know How, Can I have a Tutorial?
For those who are new or are returning to my account I've decided to reboot the calculator project. Due to the fact that I had managed to procrastinate on the original for a whole month and flaw by design I'm starting from scratch. The LCD display has been minimized and as of me posting this the addition function has been included. This only leaves output (=) to be added and possible bug fixes. In time I may consider other operations rather than that of addition but no promises. -JT